The poll shows that parties PP, Ciudadanos and Vox could gain just enough seats to control the Cortes Generales, the country’s parliament. The poll suggests the three parties will win the biggest share of the seats with around 169 to 179 being secured. According to Sigma Dos poll, which was published in newspaper El Mundo, this will be enough to get a majority from the 350 seats.
The prime minister Pedro Sanchez’s Spanish Socialist Workers’ Party will only gather around 110 seats, the biggest share of seats but some way of gaining power.
The right-wing parties winning is the first time since Mr Sanchez called the snap election last week has been predicted.
During a press conference last week, Mr Sanchez confirmed his intention to call the election on April 28.
He called it just days after his socialist government suffered a defeat when it failed to push through its budget.
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A spokesperson for the Spanish Socialist Workers’ Party told CNN the right-wing group’s team up has created difficulties for the party.
The spokesperson added: “It’s an agreement between right-wing forces and the extreme right, which is being sanitised.”
The conservative People’s Party, the latest poll shows, will get 71-75 seats, while the centre-right Ciudadanos will take 54-58.
The far-right party Vox will win 44-46 seats, according to the poll.
Vox, which backs anti-immigration policies, is a newcomer in Spain.
In a recent local election, the party gained 12 seats in Andalusia.
Since the vote was called, numerous opinion polls have been undertaken, with differing outcomes as to who will lead Spain.
Every poll so far has shown Mr Sanchez’s party will get the most seats.
But even if his party forms a coalition with Ciudadanos they would steal fall just short of the 176 needed for victory.